Auxiliary signal time sequence generating device of GIS (Gas Insulated Switchgear) operating mechanism
By using an auxiliary signal timing generator for the GIS operating mechanism, a combination of a push plate, connecting rod, and round hook spring is employed to solve the problem of premature auxiliary switch signal generation. This ensures that the auxiliary switch signal is generated only after the switch contacts are in position, thus achieving the accuracy and timing requirements of the signal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2026-03-03
AI Technical Summary
In existing gas-insulated metal-enclosed switchgear, the auxiliary switch signal may be sent out in advance during the opening and closing operation of the operating mechanism, causing the auxiliary switch to send out the position signal before the switch body contacts have reached the designated position.
Design an auxiliary signal timing generator for a GIS operating mechanism. Through the combination of a push plate, connecting rod, pull arm, and circular hook spring, ensure that the auxiliary switch square shaft sends out the opening and closing signal only after the output shaft of the operating mechanism stops moving, thus meeting the timing design requirements.
This effectively prevents the auxiliary switch from issuing a position signal before the switch body contacts have reached the designated position, thus meeting the standard requirement that the switch moving contact must be in position first before the auxiliary switch issues a signal.
Smart Images
Figure CN223967130U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of gas-insulated metal-enclosed switchgear, and in particular to an auxiliary signal timing generator for a GIS operating mechanism. Background Technology
[0002] Gas-insulated metal-enclosed switchgear is a metal-enclosed switchgear and control equipment in which at least part of it uses a gas at a pressure higher than atmospheric pressure as the insulating medium. GIS (Gas Insulated Switchgear) is the abbreviation for Gas Insulated Metal-Enclosed Switchgear. A GIS consists of circuit breakers, disconnecting switches, grounding switches, instrument transformers, surge arresters, busbars, connectors, and outgoing terminals. All these devices or components are enclosed in a grounded metal casing filled with SF6 insulating gas at a certain pressure; hence, it is also called SF6 fully enclosed switchgear. Since its practical application in the 1960s, GIS equipment has been widely used worldwide. High-voltage power grids require that the moving contacts of the disconnecting switches and grounding switches of gas-insulated metal-enclosed switchgear (GIS) reach their open and closed positions before issuing closing and open position indications and position signals. This means that when the operating mechanism performs opening and closing operations, the timing of the opening and closing of the switch moving contact must have a certain logical relationship with the switching time of the normally open and normally closed auxiliary switch of the operating mechanism, so as to meet the standard requirement that the GIS switch contact should be in position first and then the auxiliary switch should send a signal.
[0003] In some existing gas-insulated metal-enclosed switchgear, the auxiliary switch signal may be issued prematurely during the opening and closing operations of the operating mechanism. This results in the auxiliary switch issuing a position signal before the switch body contacts have reached the designated position. To solve this problem, a structure is designed that can only issue the auxiliary switch signal after the switch body contacts are fully in position. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of some existing gas-insulated metal-enclosed switchgear where the auxiliary switch signal may be issued prematurely during the opening and closing operations of the operating mechanism, causing the auxiliary switch to issue a position signal before the switch body contacts have reached the designated position. This invention provides an auxiliary signal timing generator for the GIS operating mechanism.
[0005] The purpose of this utility model is achieved through the following technical solution: A GIS operating mechanism auxiliary signal timing generation device, including a push plate and an operating mechanism output shaft. The push plate is installed at the top of the operating mechanism output shaft. One end of the push plate is connected to a pull arm through a connecting rod. The pull arm is rotatably installed on an auxiliary switch mounting plate. One end of the pull arm is connected to an auxiliary switch crank arm through a round hook spring. The other end of the auxiliary switch crank arm is connected to an auxiliary switch square shaft.
[0006] The connecting rod has a connecting rod groove, and the cylinder is slidably installed in the connecting rod groove. The operating mechanism output shaft moves clockwise or counterclockwise, which drives the push plate to move. The push plate pushes the cylinder to slide in the connecting rod groove. After the connecting rod moves, the pull arm at the other end moves accordingly. A round hook spring is installed between the pull arm and the auxiliary switch crank arm. After the pull arm starts to move, the round hook spring starts to stretch under the force of the pull arm. After stretching, the round hook spring generates a force, which pulls the auxiliary switch crank arm to move, and then drives the auxiliary switch square shaft to rotate. Thus, the auxiliary switch square shaft sends out the opening and closing signal after the operating mechanism output shaft stops moving. This effectively prevents the auxiliary switch from sending out the position signal before the switch body contacts have reached the designated position.
[0007] A further technical solution involves installing two sets of adjusting plates corresponding to the connecting rod groove on the connecting rod. The two sets of adjusting plates are located on both sides of the connecting rod groove. The adjusting plates are installed on the connecting rod by fastening bolts. The fastening bolts are used to adjust the distance between the two sets of adjusting plates. The adjusting plates can adjust the distance that the pushing cylinder slides in the connecting rod groove, thereby adjusting the movement distance of the connecting rod and realizing the adjustability of the adjusting plates. The adjusting plates are fixed on the connecting rod by the fastening bolts for movement and adjustment.
[0008] A further technical solution is that the auxiliary switch crank arm is triggered when the pull arm and the hook spring are in a perpendicular state. The auxiliary switch crank arm drives the auxiliary switch square shaft to rotate 90° to close the contacts of the auxiliary switch square shaft. The auxiliary switch crank arm is triggered when the pull arm and the hook spring are in a perpendicular state. At this time, the auxiliary switch crank arm is still stationary and in the critical position of about to act. The connecting rod can provide 95% of the power to the pull arm, leaving only the last 5%. At this time, the pull arm, the hook spring, and the auxiliary switch crank arm form a straight point position. The push plate drives the connecting rod to continue to act, providing the pull arm with the last amount of rotation. Once the hook spring passes the straight point position, the auxiliary switch crank arm will have the tendency to start acting, from 0° to 90° until the action ends, thus meeting the timing design requirements of the auxiliary switch square shaft.
[0009] This utility model has the following advantages: By setting the output shaft of the operating mechanism to move clockwise or counterclockwise, it simultaneously drives the push plate to move. The push plate pushes the cylinder to slide in the connecting rod groove. When the connecting rod moves, the pull arm at the other end moves accordingly. A round hook spring is installed between the pull arm and the auxiliary switch crank arm. After the pull arm starts to move, the round hook spring begins to stretch under the force of the pull arm. After stretching, the round hook spring generates a force, which in turn pulls the auxiliary switch crank arm to move, and then drives the auxiliary switch square shaft to rotate. Thus, after the output shaft of the operating mechanism stops moving, the auxiliary switch square shaft sends out the opening and closing signal, which meets the timing design requirements. This effectively avoids the auxiliary switch sending out the position signal before the switch body contacts reach the designated position. Attached Figure Description
[0010] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0011] Figure 2 This is a front view structural diagram of the present utility model;
[0012] Figure 3 This is a schematic diagram of the output shaft travel at 0% of the present invention.
[0013] Figure 4 This is a schematic diagram of the output shaft travel at 95% of its maximum capacity.
[0014] Figure 5 This is a schematic diagram of the output shaft travel at 100% of its maximum capacity.
[0015] Figure 6 This is a three-dimensional schematic diagram of the linkage structure of this utility model;
[0016] Figure 7 This is a schematic diagram of the rotation angle of the auxiliary switch crank arm of this utility model;
[0017] Figure 8 This is a schematic diagram of the circular hook tension spring of this utility model in the straight point position;
[0018] Figure 9 This is a schematic diagram of the auxiliary switch square shaft structure of this utility model;
[0019] In the diagram, 1. Push plate; 2. Operating mechanism output shaft; 3. Connecting rod; 4. Adjusting plate; 5. Push cylinder; 6. Pull arm; 7. Round hook tension spring; 8. Auxiliary switch crank arm; 9. Auxiliary switch mounting plate; 10. Auxiliary switch square shaft; 11. Connecting rod groove; 12. Fastening bolt. Detailed Implementation
[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.
[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0022] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.
[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0025] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0026] like Figures 1-9 As shown, a GIS operating mechanism auxiliary signal timing generation device is provided. The device includes a push plate 1 and an operating mechanism output shaft 2. The push plate 1 is mounted on the operating mechanism output shaft 2. The device is characterized in that: one end of the push plate 1 is connected to a pull arm 6 through a connecting rod 3. The pull arm 6 is rotatably mounted on an auxiliary switch mounting plate 9. One end of the pull arm 6 is connected to an auxiliary switch crank arm 8 through a round hook spring 7. The other end of the auxiliary switch crank arm 8 is connected to an auxiliary switch square shaft 10.
[0027] The connecting rod 3 has a connecting rod groove 11, and the cylinder 5 is slidably installed in the connecting rod groove 11. The operating mechanism output shaft 2 is set to move clockwise or counterclockwise, which drives the push plate 1 to move. The push plate pushes the cylinder 5 to slide in the connecting rod groove 11. When the connecting rod 3 moves, the pull arm 6 at the other end moves accordingly. A round hook spring is installed between the pull arm 6 and the auxiliary switch crank arm 8. After the pull arm 6 starts to move, the round hook spring 7 starts to stretch under the force of the pull arm 6. After stretching, the round hook spring 7 forms a force, which pulls the auxiliary switch crank arm 8 to move, and then drives the auxiliary switch square shaft 10 to rotate. Thus, after the operating mechanism output shaft 2 stops moving, the auxiliary switch square shaft 10 sends out the opening and closing signal, which effectively avoids the auxiliary switch sending out the position signal when the switch body contacts have not reached the designated position.
[0028] One end of the push plate 1 is equipped with a push cylinder 5, which is inserted into the connecting rod groove 11 to push and pull the connecting rod 3. The other end of the connecting rod 3 cooperates with the pull arm 6 on the auxiliary switch mounting plate 9. A round hook spring 7 is installed between the pull arm 6 and the auxiliary switch crank arm 8. The round hook spring 7 cooperates with the auxiliary switch square shaft 10 on the auxiliary switch.
[0029] Two sets of adjusting plates 4 corresponding to the connecting rod groove 11 are installed on the connecting rod 3. The two sets of adjusting plates 4 are located on both sides of the connecting rod groove 11. The adjusting plates 4 are installed on the connecting rod 3 by fastening bolts 12. The fastening bolts 12 are used to adjust the distance between the two sets of adjusting plates 4. The adjusting plates 4 can adjust the distance of the sliding of the pushing cylinder 5 in the connecting rod groove 11, thereby adjusting the movement distance of the connecting rod 3 and realizing the adjustability of the adjusting plates 4. The adjusting plates 4 are fixed on the connecting rod 3 by the fastening bolts 12 for movement and adjustment.
[0030] The vertical position of the pull arm 6 and the hook spring 7 is the trigger position of the auxiliary switch crank arm 8. The auxiliary switch crank arm 8 drives the auxiliary switch square shaft 10 to rotate 90° to close the contacts of the auxiliary switch square shaft 10. The pull arm 6 and the hook spring 7 are set to be in a vertical position as the trigger position of the auxiliary switch crank arm 8. At this time, the auxiliary switch crank arm 8 is still stationary and is in a critical position about to be activated. The power that the connecting rod 3 can provide to the pull arm 6 has reached 95%, with only the last 5% remaining. At this time, the pull arm 6, the hook spring 7 and the auxiliary switch crank arm 8 form a straight point position. The push plate 1 drives the connecting rod 3 to continue to move, providing the pull arm 6 with the last amount of rotation. Once the hook spring 7 passes the straight point position, the auxiliary switch crank arm 8 will have the tendency to start to move, from 0° to 90° until the end of the movement, thus meeting the timing design requirements of the auxiliary switch square shaft 10.
[0031] When the output shaft 2 of the operating mechanism is moving, due to the idle time between the connecting rod groove 11 and the push plate 1, the movement time of the connecting rod 3 is later than that of the push plate 1. When the round hook spring 7 between the pull arm 6 and the auxiliary switch crank arm 8 is stressed past the straight point position, the auxiliary switch crank arm 8 will move. At this time, the output shaft 2 of the operating mechanism has moved to 95% of the total stroke, and the auxiliary switch square shaft 10 on the auxiliary switch will start to move from 0° until it moves to the required 90° of the auxiliary switch.
[0032] Because the release speed of the main spring that drives the output shaft 2 of the operating mechanism is faster than the pull-back speed of the hook spring 7 that drives the crank arm 8 of the auxiliary switch, and when the output shaft 2 of the operating mechanism reaches 95% of the total stroke, the auxiliary switch square shaft 10 on the auxiliary switch starts to move from 0°, the time difference satisfies the function of the auxiliary switch square shaft 10 on the auxiliary switch to move to the position and send the opening and closing position signal after the output shaft 2 of the operating mechanism is in position.
[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A timing generator for auxiliary signals of a GIS operating mechanism, comprising a push plate (1) and an operating mechanism output shaft (2), wherein the push plate (1) is mounted on the top end of the operating mechanism output shaft (2), characterized in that: One end of the push plate (1) is connected to a pull arm (6) via a connecting rod (3). The pull arm (6) is rotatably mounted on the auxiliary switch mounting plate (9). One end of the pull arm (6) is connected to the auxiliary switch crank arm (8) via a round hook spring (7). The other end of the auxiliary switch crank arm (8) is connected to the auxiliary switch square shaft (10). The connecting rod (3) has a connecting rod groove (11) and the cylinder (5) is slidably installed in the connecting rod groove (11).
2. The GIS operating mechanism auxiliary signal timing generation device according to claim 1, characterized in that: Two sets of adjusting plates (4) corresponding to the connecting rod groove (11) are installed on the connecting rod (3). The two sets of adjusting plates (4) are located on both sides of the connecting rod groove (11). The adjusting plates (4) are installed on the connecting rod (3) by fastening bolts (12). The fastening bolts (12) are used to adjust the distance between the two sets of adjusting plates (4).
3. The GIS operating mechanism auxiliary signal timing generation device according to claim 1, characterized in that: The pull arm (6) and the round hook spring (7) are in a vertical state as the trigger position of the auxiliary switch crank arm (8). The auxiliary switch crank arm (8) drives the auxiliary switch square shaft (10) to rotate 90° to achieve the closing of the contacts of the auxiliary switch square shaft (10).